| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a period [prep] | 2664 |
|
| 2 | a period [prep] | 2664 |
|
| 3 | a period of | 2396 |
|
| 4 | a period of | 2396 |
|
| 5 | a period [adv] | 203 |
|
| 6 | a period [Wh adv] | 131 |
|
| 7 | a period in | 125 |
|
| 8 | a period in | 125 |
|
| 9 | a period when | 120 |
|
| 10 | a period when | 120 |
|
| 11 | a period [conj] | 75 |
|
| 12 | a period [verb] | 67 |
|
| 13 | a period [adv] | 55 |
|
| 14 | a period [pron] | 40 |
|
| 15 | a period [noun] | 36 |
|
| 16 | a period [subord] | 29 |
|
| 17 | a period [Wh det] | 29 |
|
| 18 | a period [noun sg] | 28 |
|
| 19 | a period which | 27 |
|
| 20 | a period which | 27 |
|
| 21 | a period [vb pp] | 26 |
|
| 22 | a period [coord] | 25 |
|
| 23 | a period [adj] | 25 |
|
| 24 | a period during | 24 |
|
| 25 | a period during | 24 |
|
| 26 | a period that | 21 |
|
| 27 | a period that | 21 |
|
| 28 | a period [that] | 21 |
|
| 29 | a period [v-ing] | 19 |
|
| 30 | a period [adj] | 17 |
|
